What size round ball are yall using in your kibler 20 ga Fowler?

[Texcl2]

I just picked up another kibler fowler kit, this time a walnut 20 ga quick ship. I’m gonna be buying a round ball mould for it, what size are yall using? Have any of yall measured your bore diameter?

 

[Flintandsteel]

Mine likes this combo.

 

[Texcl2]

How tight is that ball/patch combo?